Coupling



May 4, 1948.

J. 'r'. KRAPP 2,441,075

COUPLING Filed Aug. 14, 1945 3 Sheets-Sheet 1 INVENTOR. JOHN T. KRAPP wwm+m J. T. KRAPP May 4, 1948.

COUPLING Filed Aug. 14, 1945 3 Sheets-Sheet 2 7/ 5 mm 03 B I O 9 m 2 l. -.b/- W n w {2 w 3 5 I: 38 4 2 8% 3 2 INVENTOR. JOHN 7. KRAPP A r Toe/yew 4, 1948- J. T. KRAPP 2,441,075

courmue- Filed Aug. 14, 1945 s Sheets-Sheet 3 IN V EN TOR. JOHN 7. KEAPP A 71 TORNE rs Patented May 4;, 1948 aims UNITE STATES PATENT OFFICE COUPLING Jolm fl Krapp; Port Washing-team 1 Application August 14,1945, Ser'ihlNo. 611E779 10 Glaims: 1

This invention relates to improvements in couplings and has for an object the provision of of a quickly separable coupling at least one member of which includes a valve which closes as the members of the coupling arev separated and opens as the members of the coupling are forced together in normal co-operative relationship.

Another object of the invention is the provision of a coupling including two quickly separable members adapted to be placed together and cammed into co-operative relationship, one of said members being adapted to be connected to a fluid medium and including a valve which is closed, when the members are separated, and which opens and allows the fluid medium to flow when the two members are cammed together to form a fluid tight seal between each other.

Yet another object of the invention is the provision in at least one member of a separable coupling, a valve member adapted to open and provide a substantially unrestricted orifice for fluids under the urge of a substantially smaller motion employed while said coupling members are being forced together in fluid tight relationship. i

A further object of the invention is theprovision ofa quickly separable coupling comprised of not less than two co-operative members each of which includes valve means which are closed when the coupling members are separated and which are opened when the coupling members are placed together and forced into sealing relation with each other.

Other objects and advantages of the invention will be apparent to those skilled in the art, and upon the study of the following specification and the accompanying drawings.

Referring to the drawings which are given by way of example to illustrate the invention:

Figure l is an elevation of one embodiment of my new and improved coupling;

Figure 2 is a sectional elevation of the coupling shown in Figure 1, the valve means therein being closed;

Figure 3 is a sectional elevation similar to Fig ure' 2, except that the two coupling members have been clamped together in fluid tight relation and the licrcing of the two members together to form a fluid tight seal has been multiplied through the linkages shown to open the valve means so that fluid mediums can flow substantially unobstructed through the coupling;

Figure 4 is a plan view partly in section taken along the lines t-t of Figure3; v

Figure 5 is' a view taken along the lines s5=-liof Figure 3;

Figured is" a fragmentary view showing the relation of oneof the camming members carried on one of the coupling members and showing itsrel'ati'onto the annular groove formed in the other coupling member; this view is taken along the lines 6+6 of Figure" 2'; and

Figure 7" is a sectional elevation of a coupling comprised of twomembers each of which includes a valve adapted toclos'e when the members are separated, both said valves being-adapted to open when said members are cammed together.

Referring first to Figures 1 2'and3, the coupling is comprised of two quickly separable members one" of' which is generally designated by the numeral It, and the v generally designated by the numeral H. The portion" HT, which might be termed themale por-' tion, includes a tubular body It; and cformed integral therewith is a threaded boss 3. The tubular portion l2 has an interior bore l' l'which extends from the lower end to meet a tapered hole I 5; The threadedboss I3 has an interior bore" [6 which extends from the topend' (as viewed in' Fig. 2)' to the" tapered hole [5. Adjacent the lower end and mounted in the bore M is a spider having acavity (8 formed therein and facing downwardly.

other of which is Extending radially from the hub I! are a plurality of spokes two of which are shown 'at l $l 9 and these spokes joi is secured to or cast integral with the interior wall of the bore M'. can the outside of the tubu= lar portion [2, near' the lower end thereof, is formed an: annular groove 2i. stood that although the member It is shown" as carrying an externally threaded boss l3; it may instead carry flanges orany other form of connection suitable for connecting it to a point of use.

The couplingmember" H has a tubular portion 22, theinterior bore 23' of which is adapted to accommodate thetubular portion 52. The bore 23 terminates on a shoulder 25 formed in the body of the portion 22-". Mounted on theshoulder 24 is" an: annular washer zt-which may of rubber or' like resilient material; The shoul' der 24 is steppedofc'oun'terbored at 26" to form. a shoulder for the member" 21'. The member 21 can be seenfrom below in Fig. 5, and it consists" hub l-'! with a rounded n a ring portion 29 which It will be underbe formed the hole 55 is closed by in a boss 49 which hasan interior threaded bore 4 4| terminating against a shoulder 42. The boss 4| has an opening 43 formed therein which forms an inner boundary of the shoulder 42. Spaced apart from the opening 43 is a spider 44 which includes a hub 45 which is joined to an annular rim 46 by means of a plurality of spokes 41, the openings therebetween forming passages for the fluid. The rim 45may be formed integral with the body 39. or it may be formed separately and permanently secured in the body 39.

Between the flanges 34 and 39 a suitable sealing ring 48 isprovided and these flanges are secured together in sealing relation by means of bolts 49 which extend through holes in the flange 34 and engage threaded holes in the flange 38. Mounted on the hub 45 of the spider 44 is a stud 59 which has a shank 5|.

A valve member 52 consists of a disc having an annular seating surface 53 adapted. to seat on the sealing ring 31. The valve member has a downwardly extending boss 54 with a central vertical hole 55 formed therein. The upper end of a rounded stud 56. Surrounding the boss 59 and the boss 54 is a helical spring 51, the lower end of which seats in a depression |38 formed in the hub 45 and the upper end of which-fits in an annular depression 58 formed in the valve member 52 adjacent to the boss 54. The function of the spring 51 is to ur e the valve member 52 against the sealing ring 31.

Formed on the upper surface of the valve member 52, in spaced relation to each other, are bosses 59 and 69. These bosses are slotted to accommodate link members 6| and 62. The lower end of the link member 6! carries a pin 63 which is positioned in aligned elongated holes 64 formed in the two halves of the slotted. boss 59. Likewise the lower end of the link member 62 carries a pin 65 which is posit oned in aligned elongated holes 65 formed in the slotted boss 69. The upper end of the link 6| carries a pin 61 which fits in aligned holes formed in the slotted boss 3|. Likewise the upper end of the link member 62 carries a pin 68 which fits in aligned holes formed the slotted boss 39. The boss 32, carried on the member 21, may have a square hole extending therethrough vert cally, and mounted in this hole is-a square rod 69 the upper end of which is adapted to be engaged by the cavity I3 formed in the hub l1. The lower end of the rod 69 may have formed integral therewith or permanently secured thereto, a rounded camming member 19 which engagesthe link members 6| and 52 and thereby force the valve 52 off of the sealing ring 31 when the coupling members |9 and II are clamped into sealing relation with each other.

Referring now to Fig. 6, the tubular portion of the member has formed thereon aligned bosses 1|, 12 which are machined out to form a working flt with a shaft 13. The shaft 13 is threaded at one end and carries a nut 14, and the other end, as may be seen in Fig. 1, has a lever mounted thereon and keyed thereto by means of a taper mitting it to be easily removed following description,

half of the coupling which are identical with the pin 16. The shaft 13, as is shown in dotted lines in Fig. 6, has an arcuate cut-out portion 11 which, as may be seen in Fig. 2, is adapted to clear the portion l9 when it is inserted into the bore 23 of the tubular portion 22. On the opposite side of the tubular portion 22 are aligned bosses one of which may be seen at 18 and these bosses are parallel to the bosses 1|, 12 above described. These bosses are machined out to form a working fit with a shaft 19 which is identical with the shaft '13 and which has an arcuate cut-out portion 89 like the cut-out portion 11 on the shaft 13. The

' shaft carries a nut on one end corresponding to the nut 14,

and mounted on the other end is a handle 8| which is secured to the end of the shaft 19 by means of a taper pin 82.

Normally the handles 15 and 8| may point downwardly, as shown in Fig. 1, said positions defined by stops, not shown. When the portion i9 is inserted in the bore 23 and it is desired to clamp the two members together in fluid tight relation, the handle 15 is turned in a counterclockwise direction as viewed in Figs. 1 and 2, is turned in a clockwise direcand the handle 8| tion until both handles extend vertically, said positions being defined by other stops, not shown.

The act of turning the handles in the directions described causes the cut-away surface 11 on the shaft 13 to engage the annular groove 2| on one side of the member :9 and causes the cut-away portion 89, 0f the shaft 19, to engage the annular groove 2| on its opposite side. As the shafts are rotated by the handles the member H) is moved downwardly against the resiliency of the rubber washer or ring 25 and at the same time the cavity, or depression, i8 in the hub engages the rod 69 thereby causing the camming member 19 to bear against the link members 6| and 62 and unseat the valve member 52 thereby permitting fluid medium from any source to which the coupling member H is connected, to flow therethrough. When it is desired to separate the coupling members, the handle 15 is turned in a clockwise direction and the handle'8l is turned in a counter-clockwise direction thereby causing the shafts 1 3 and 19 respectively to become dis-- engaged from the annular groove 2|. When this occurs the spring 51 urges the valve member 52 upwardly and firmly urges it into seating relation with the sealing ring 91. The resiliency of the washer 25 urges the member l0 upwardly a sufi|- cient distance to "break the hold thereby perfrom the bore 23.

Referring now to Fig. 7, a modification of the invention is shown in which each half of the coupling includes a valve which is open when the members are clamped together in sealed relation and which closes when the members move axially, for example, in the act of being separated.

As viewed in Fig. '1, the lower half of the coupling Ha is generally identical with the lower half ll of the coupling shown in Fig. 2. In the all elements of the lower lower half of the coupling shown in Fig. 2, will bear the same number followed by the letter a. The coupling member Ila has a tubular portion 22a, the interior bore 23a of which is adapted to accommodate the tubular portion of the other member. The interior bore 230, terminates on a shoulder 244; formed in the body of the portion 22a. The shoulder 24a is contiguous with the ,lower edge of a groove 83. Mounted on the shoulder 24a and extending into the grcove.,8 3 is an annular washer 25a which may be formed I adjacent to the boss Etc.

of mbber or like resilient material; prevents the washer "25a from falling "out of the body Ma when the coupling members are separated. The shoulder Na. is stepped or 'counter bored at 26a, toiforma shoulder fort'he member 21a; The member 21a is similar to the member 21 shown in Fig. 5, and it consists ofa ring with cut out-sectors 2:8 and having there-between a 'eb 29 carrying slotted bosses :35 and 34 in spaced relatlonto 8&6151'0'511612- The web 25 carries on its opposite face a boss -32. The member We is pe'rman'ent-ly secured on the shoulder and supponts a valvewhioh will presently be described. Gontiguous with the portion 22a a portion 33a tapersoutward-ly and terminates in annular flange 34a. The interior of the portion Silavhas a bore 35a which is counterbor'ed to 'form an annular shoulder 36a upon ii nch mounted a sealing ring 31a with which the valve, to he presently described, cooperates. The member 1 la "has a lower portion which carries a flange 38a adapted to co-operate' with the flange 34a. Extending downwardly from the flange sea the body" 3% flares inwardly and downwardly and terminates in a boss tea which 'The groove hai'sianint'erior threaded bore l-la which is bouhded by an inwardly extending shoulder 42a. The boss Ma :has an opening taloirned therein and constitutes the inner boundary of the shoulder 42a, Spaced apart from the opening 43a is a spider Ma which includes a hub 45a which is joined toan annular rim the by means of a plurality of spokes 41d, the openings therebetween formiing passages for the :fluid medium. The rim Mia may he formed integral with the body 3901 or it may be formed separately and permanently secured in the body 39a. Between the fi-ang'e's' 34a 38a is a suitable sealing ring 4812 and the flanges are secured together with the sealing ring therebetween by means of bolts 49a which extend through holes in the flange 34a and engage threaded holes in the flange 38a. Mounted on the hub 45a is a stud tea which has a shank 5='ia.- A valve member 52d consists of a disc having an annular seating surface can adapted to seat on the sealing ring 31a; The valve member has'a downwardly extending boss 5411 with a ceiitral hole upper end of the hole rounded boss 56d.

Sinro'u'nd ing the bosses 53a and Eda, is a helical spring cm the lower end of which bears in a groove [38d formedon the hub 35a and the upper" end of which efitends into an annular depression 580 formed in the valve member 52a The function of the valve member" 52a 55a terminates within a s ring 57a is to urge the against the ring 31a};

Formed on the upper surface of the valve member 52a; in spaced relation to' each other, are bosses 59a and eta, These bosses are slotted to accommodate iink'members tile and 52a re net-- tiveiyi The IOWe'I hd of tho link member 6E0;

' carries a pin 63d which is positioned in aligned elongated holes Ma formed in the two" halves of the slotted boss 59a. Likewise the} lower end of the link member 6211; carries a pin 65a which is positioned; in aligned elongated holes 5661' formed in the slotted boss Gila. The upper end of the link Gl'a" carries a pin 67a which fits in aligiied holes formed in theslotted boss 3 I. Like wise the upper end of the link member 6211' car riesfla'i pm 580, which fits in aligned holes formed in the slotted bassist. The b 32 carried on the member'smma 'neve a squarenoie extend a formed therein. Y

mg therethrough vertically with a square rod 69a imounted thereinl The lower end of the rod tea may have for-med integral therewith, or permanently rs'ecured thereto, a rounded camming member 10a which engages the link members 6m and 62a and thereby force the valve 52a away from "the sealing ring We when the coupling members are clamped together, as will presently be described.

The upper end of the square rod 69a has a portion 84 which is" round and provided with threads. An engaging member 85 has an interiorly threaded hol'e engaging a threaded portion 84 of'the push rod 69050 that the engaging member may be adjusted on and down on the said threaded portion to obtain a desired adjustment. A lack nut 8'5 011' the portion 8 is provided for locking the engaging member '85 in a set posi- The" upper half of the coupling is generally designated by the numeral 81 and includes a tubular body 88 which fits into the bore 23a of the lower half of the coupling.

Continguous with the portion 8311s a, portion 89 which tapers outwardly and terminates in an annular flange 90. The interior of the portion 59 has a bore 9| which is counterbo'red to form an annular shoulder 92 upon which is mounted a sealing ring 93'. The sealing ring co-operates with a valve which will presently be described. The member 81 has an upper portion which carries 'a fi'a'n'ge' 9'4. Extending upwardly from the flange 94 the body 95 flares inwardly and up wardly and terminates in a boss fit. The exterior surface of the boss 96 may be provided with threads 91 to be engaged by a suitable fitting. The boss 93 has an interior bore 98 which forms a part of a passage 99 extending through the member 8'1. The portion 95 carries a spider mt. The spider I00 has a rim l'ili which may be formed integral with the body 95 or it may be formed outside of the b dy and permanently mounted therein.- The" spider also has a hub Hi2 carrying a the rim 191, the openings therebe'tween forming between the opening provided by bore '98 'andthe' interior 99.

Secured to the hub I92 is a stud shank IE5 or reduced diameter.

Between the flanges and 94 is sealing ring it gether with the IM having a positioned a and thefian'ges are secured tosealingring therebetween by means of bolts it? which extend through holes in the flange 99 and engage threaded holes in the flange 9d. A valve member I38, similar to the valve member 52a has a seating face 539 adapted to seat on the" sealing ring 93 under the urge of a spring ['10 which embraces the stud Hi4 mounted on the hub i 62 and the upper end seats in groove I38.- The spring He also embraces a boss H l formed integral with the valve member Hi8 and has its end seating in a groove I it formed in the valve member adjacent to the boss H1; The" boss HI hasa clearance hole H3 for the shank M5. The hole H3 bottoms in a rounded boss (it formed on the lower face oi the val'v'ein the center thereof. The valve lilo carries on itsl'ower surface spaced bosses H5, I it which are" slotted toaccomrnodate the upper ends of link members UT and end ct the li A spider I23 is secured in formed'in the portion 83. This spider may be identical with the spider shown in Fig. and carries a boss I25 with a rectangular hole therein. Slidably mounted in the rectangular hole is a square rod I26 which has a round threaded portion I21. The upper end of the rod I26 has secured thereto, in cross-wise relation, a round camming member I28 which acts against the link members H1, H8. The lower end of the link member III carries a pin I29 which extends through aligned holes in a boss 3I thereof. The lower end of the link member H8 carries a pin I39 which extends through aligned holes in the boss The threaded portion IZ-I carries an engaging member I3! which may be adjusted up and down thereon by means of the threads and which may be locked in an adjusted position by means of a lock nut I32. The manner in which the members H2 and 81 are secured together in sealed relation is exactly like that described in connection with the members I!) and II in Figs. 1, 2 and 3. The member IIa carries shafts I3 and IS on opposite sides thereof, the shaft I3 extending through a boss I33 formed on the portion 22a, and the shaft I9 extends through a boss I34 carried on the opposite side of the portion 22a. The portion 88 has an annular groove 135 formed therein and this groove is preferably of hollow semi-circular cross section. The shaft '13 has a cut-away portion I1 which cams against the lower boundary of the groove I35 and as the shaft I3 is rotated in a counter-clockwise direction the member 81 is cammed downwardly in sealed relation with the sealing ring 25a. The shaft I9 has a cut-away portion 80 which cams against the lower edge of the groove on the opposite side of the member 88 when the shaft 19 is rotated in a clockwise direction. It will be understood that the shaft I3 is provided with a handle similar to the handle I5, shown in Fig. l; and the shaft I9 is provided with a handle similar to the handle 8I. As these shafts are rotated to bring the lower end of the member 88 into sealing relation with the washer 25a, the washer is squeezed and flattened. The engaging members 85 and I3I have been adjusted so that as soon as the camming surfaces 11 and 80 engage the groove I35 the engaging members touch one another. When the shafts I3 and I9 are rotated to a point where the slotted portions thereof lie in the groove I35, the valve member 520. and the valve member I08 are moved away from their seats (in contact with the rings 31a and 93 respectively), due to the action of the camming members 1911 against the linkages Na and 62a, and the camming action of the member I28 against the link members It! and H8. Therefore, when the two members are placed together in the manner described above to sealingly connect them, the valves are opened the while so that fluid mediums in vessels, connected to the threaded portions 4 la on one of the members and 9'! on the other of the members, will flow therethrough. This eliminates the necessity of having separate valves in each line which would have to be opened by hand after the coupling members have been secured together in sealed relation.

When the shaft I9 is turned in a counter-clockwise direction and the shaft I3 in a clockwise direction, the reaction of the rubber ring or washer 25a forces the couplings in opposite directions and the engaging members 85.and I3I tend to move away from each other.- spring 51a urges the valve membertSZa back on However, the;

the interior bore I26 its seat and the spring Ila and 8'! are separated,

into the atmosphere.

Although I have herein shown and described, a quickly separable coupling l member which includes a valve which automatithe coupling members are placed in sealed relation with each other; and a modification thereof in which both coupling by Way of example,

cally opens when said members together in fluid-tight relation with therebetween, thereby compressing said gasket, a valve in at least oneof a deformable gasket said members; means controlled. by said first means for opening said valve a distance greater than the amount said gasket is compressed as said members are urged into said fluid-tight relation, and means cooperating with said valve to cause it to re-seat as said members are separated.

2. In a separable coupling, a pair of members each of which has a passage therethrough, one of said members having a shoulder therein, a

sealing gasket positioned on said shoulder, said members including portions adapted to telescope together with said passages in end to end relation as the end of one of said members contacts said sealing gasket, means to urge said members in fluid tight relation, thereby compressing or deforming said gasket, a valve in at least one of said members and compound means controlled by said means to urge and adapted to opensaid valve a greater distance axially than the distance said gasket is compressed as said members are said means to urge urged into fluid tight relation, also being adapted to close said valveas members are separated.

3. In a separable coupling, each of which has a the passage therethrough,-one

of said members including a male portion and-- the other member including a female portion having an annular shoulder formed therein, a gasket on said shoulder, said portions being,

adapted to be telescoped together with the end of said male portion engaging said gasket and with said passages in end to end relation, quick-acting means for urging said members into sealed relation by compressing said gasket on said valve in at least one of said members and compound ing means for opening are urged into said sealed relation and for closing said valve as said members areseparated.

4. In a separable coupling, a member of generally tubular form having a passage there-=- through, an annular groove formed on said memthereof, means: at the 1 other end of said member for connecting the;-; fluidmedium; abutment means supported in said passage, a* second member having a socket formed on one:-

ber adjacent to one end same to means for conveying a end thereof terminating on a shoulder, the other end of said second H9 urges the valve member I98 back on its seat so that as the members the valves have closed' the passages in these members'so that the fluid medium in both the source and the vessel receiving the same are cut off from and cannot leak and described without departing a pair ofmembers" seat, a I

lever means controlled by said quick act-- said valve as said members e b r being adapted. to

be connected to means for conveying a fluid medium, a deformable sealing ring positioned on said shoulder and adapted to be engaged by said first mentioned end of said first member, a valve seat formed in said second member, a valve supported therein, spring means urging said valve toward said seat, means engaging said groove and urging said members together in fluid tight relation and thereby deforming said ring, and compound lever means within said second member pivotally connected to the wall thereof and operatively connected to said valve, said compound bar means also having in contact therewith plunger means adapted to be actuated by said abutment as said ring is being deformed for forcing said valve off of said seat against the urge of said spring means.

5. In a separable coupling, a member of generally tubular form having a passage therethrough, an annular groove formed on said member adjacent to one end thereof, means at the other end of said member for connecting the same to means for conveying a fluid medium, abutment means supported in said passage, a second member having a socket formed on one end thereof terminating on a shoulder, the other end of said second member being adapted to be connected to means for conveying a fluid medium, a deformable sealing ring positioned on said shoulder and adapted to be engaged by said first mentioned end of said first member, a valve seat formed in said second member intermediate the ends thereof, a valve supported therein, spring means urging said valve against said seat, means cooperating with said groove and adapted to force said members together in fluid tight relation, thereby deforming said ring, and compound linkages connected to said valve and pivotally connected to the interior of said second member, and actuating means between said linkages and said abutment adapted, when moved into engagement with said abutment as said sealing ring is deformed, to move said valve off of its seat against the urge of said spring means a distance substantially greater than the amount said sealing ring is deformed.

6. In a separable coupling, a member including a portion of generally tubular form, said member having an annular passage therethrough, an annular groove formed on said tubular portion adjacent to the end thereof, means at the other end of said member for connecting the same to a system conveying a fluid medium, a Valve seat formed in said member intermediate the ends thereof, a valve supported therein, spring means urging said valve against said seat, compound linkages connected to said valve and to the interior of said member, plunger means for actuating said linkages and opening said valve, a second member having a socket formed on one end thereof terminating on a shoulder, the other end of said second member being adapted to be connected to a system conveying a fluid medium, a deformable sealing ring positioned on said shoulder and adapted to be engaged by said first mentioned end of said first member, a valve seat formed in said second member intermediate the ends thereof, a Valve supported therein, spring means urging said last mentioned Valve against said last mentioned seat, compound'linkages connected to said last mentioned valve and also to the interior of said second member, a second plunger means for actuating said last mentioned linkages and opening said second mentioned valve, both said plunger means being positioned in the respective members so as to be brought in end to end cooperative relation when said members are brought together, means in said second member adapted to cooperate with the groove on said first member and force said members together in fluid tight relation, thereby substantially deforming said ring and bringing the ends of said plungc the diameters of the passages in said members.

8. In a separable coupling, a pair tive members having passages therethrough, one of which includes a socket terminating in a shoulder, a deformable sealing ring positioned on said shoulder and adapted to be engaged by the end of the other member, means to urge said members in fluid-tight relation thereby compressing and deforming said ring, a spring loaded valve in one of said members carried on linkages pivotally connected to the inner wall of said last member, a second spring loaded valve also carried on linkages pivotally connected to the inner wall of the other of said members, and individual plunger means in cooperative relation with each of said linkages and adapted to engage one another and open said valves as said members are urged in fluid-tight relation by deforming said ring, said valves being larger in diameter than said passages, each of said members having portions of larger diameter to accommodate its valve and said portions being separable to give access to said valves.

9. A separable coupling according to claim 5, in which said linkages have associated therewith a push rod carrying camming means cooperating with said linkages on one end thereof, the other end thereof being adapted to be actuated by said abutment means.

10. A coupling according to claim 5, in which said valve is comprised of a disc having an annular seating face and carrying slotted lugs, oppositely disposed and spaced apart from each other, said lugs having aligned elongated holes formed therein, and in which said linkages are comprised of two levers one of which carries a pin positioned in the elongated holes in one of the slotted lugs, and the other of which carries a pin positioned in the elongated holes in the other of said slotted lugs, said levers crossing each other in the vicinity of the axis of said coupling members, and a fixed support plate pivotally supporting both said levers, and a movable member camming against said levers where they cross each other and adapted to be actuated by said abutment means as said members are forced to gether in said fluid tight relation.

JOHN T. KRAPP.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,569,136 Pardee Jan. 12, 1926 1,968,075 Ewald July 31, 1934 of co-opera 

